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I would say an OEM GSR exhaust system is around "1.91 - 2.0". If you're getting an exhaust made you might as well bump it up to 2.25', IMO. Are you staying NA?
I've "heard" that on my 99 GSR it is 2 1/4 but not mandrel bent so it looks smaller. Never measured so I don't know for sure. As far as your custom exhaust goes, 2.25 - 2.50 should be good.
i say dont go any bigger than 2.5.. bigger piping = less back pressure = less horsepower. if you were turboing thats a different story.. other than that stick with less than 2.5
i say dont go any bigger than 2.5.. bigger piping = less back pressure = less horsepower. if you were turboing thats a different story.. other than that stick with less than 2.5
It isn't backpressure, it is flow velocity. And it would mean less low end torque. 60 mm is probably a good diameter to go with. And for all the metrically-challenged, that is 2.36 inches.
Yeah. There is an INCREDIBLE team-integra.net article on this. Its all related to pressure waves and keeping them in order and in a straight line to maximize flow. Got to team-integra.net and click the articles link at the top then check the exhaust section. It's well worth your time. I promise.
